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    <meta charset="UTF-8">
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    <title>Document</title>
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<body>
    <script>
        var person1 = {
            name: "小明"
        }
        var person2 = {
            name: "小强"
        }
        var speak = function(person) {
            console.log(this.name + "大声叫");
        };
        speak.call(person1);
        speak.call(person2);
    </script>
</body>

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